Description of the mature larva of Hydrothassa fairmairei (Brisout) (Coleoptera: Chrysomelidae: Chrysomelinae) and key to the larvae of the genus

Abstract

Mature larva of Hydrothassa fairmairei (Brisout) is described and illustrated for the first time, based on specimens collected on Ranunculus spp. (Ranunculaceae) in Spain. A key to known larvae of genus Hydrothassa Thomson is provided. Diagnostic characters for the identification of species within this genus are number and size of abdominal dorsal tubercles, size of prothoracical setae and number of setae of anterior dorsal mesoand metathoracical tubercles. The larva of H. fairmairei is similar to that of H. marginella (Linné), but is clearly separated by the number of setae of dorsal anterior tubercle of mesoand metathorax. Notes on distribution and host plants are included.